# TMP303DDRLR

**Texas Instruments** · Thermostat Switches · SOT-563

TMP303DDRLR from Texas Instruments, in a SOT-563. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | HYSTSET0 | input | Digital input pin used to set thermal hysteresis; configure with HYSTSET1 to set 1°C, 2°C, 5°C, or 10°C hysteresis window. |
| 2 | GND | power_in | Ground reference. |
| 3 | OUT | output | Active high push-pull digital output pin that goes high when measured temperature exceeds trip point; does not require pullup resistor; output voltage VOH minimum (VS - 0.4) V at IOH = 0.5 mA. |
| 4 | SOH | input | Set output high input pin with 100 kΩ internal pulldown resistor; when pulled high forces OUT pin high regardless of temperature. |
| 5 | VS | power_in | Power supply positive voltage; operating range 1.4 V to 3.6 V. |
| 6 | HYSTSET1 | input | Digital input pin used to set thermal hysteresis; configure with HYSTSET0 to set 1°C, 2°C, 5°C, or 10°C hysteresis window. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-563 |
| Category | Sensors |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TMP303DDRLR`
- Footprint: `Package_TO_SOT_SMD:SOT-563`
- 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files: `tmp303ddrlr-etched.step` / `tmp303ddrlr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tmp303ddrlr.step` / `tmp303ddrlr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tmp303) (25 pp, sha256 `49900406e93c9481`, retrieved 2026-10-03, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tmp303ddrlr-datasheet.pdf)